* @return
* An instruction file, or null if no instruction file was found.
*/
private S3Object getInstructionFile(GetObjectRequest getObjectRequest) {
try {
GetObjectRequest instructionFileRequest = EncryptionUtils.createInstructionGetRequest(getObjectRequest);
return super.getObject(instructionFileRequest);
} catch (AmazonServiceException e) {
// If no instruction file is found, log a debug message, and return null.
log.debug("Unable to retrieve instruction file : " + e.getMessage());
return null;